Per-unit impedances of synchronous machines

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1、allthesemultiplevaluesmaybecorrectPer-UnitImpédancesofSynchronouswhendennedproperlyintermsofrotor-currentbases.ItisgeneralpracticeatthepresentMachinestimetoderivetheper-unitimpedancesofthevariouscircuitelementsinanindividualanddetachedsense.ForinA.W,RANKINstance,.animpedancemeasurabl

2、efromASSOCIATEAIEEthestatorisconvertedtoperunitbydividingthephysicalvaluebytheselectedunitvalueofstatorohmsXm(univerHEANALYSISofsynchronousnizantoftheneedformorecompletesallytakenasphasevoltagedividedbyTmachineryisdependentuponacorimpedancedata.phasecurrent);theper-unitimpedancesrect

3、andcompleteknowledgeofthemaItisthepurposeofthispapertopreofthevariouselementsinthemultiplechineimpedances.Theprogressofsynsentgeneralizedformulasbymeansofrotorcircuitsareobtainedbytransferringchronous-machineanalysishasbeencharwhichtheper-unitimpedancesofthethecorrespondingphysicalim

4、pedancesacterizedbytherecognitionofaninnewadditionalrotorcircuitsmaybetothestatorbysomeeffectivestator-creasingnumberofrotorcircuitsandbycalculateddirectlyfromthephysicalimrotorturnratio,anddividingthetransanaccompanyingneedfor,accuratepedances(inohmsandhenrys),andbyferredvaluesbyX^,

5、.Thevariousrotor-numericaldataontheimpedancesofmeansofwhichthesenewper-uhitimcircuitimpedancespublishedbyanyonetheseadditionalrotorcircuits.Thepedancescanbemadeconsonantwiththeinvestigatorusuallyareconsistentamongmodernequivalent-circuitmethodofper-unitimpedancesofrotorcircuitsthemse

6、lveswhenstudiedasadetachedanalysisdemandsanalmostlimitlesspreviouslyanalyzed.group,buttheper-unitimpedancespubarrayofimpedancesinvolvingnotonlyThetechnicalliteraturecontainssevlishedbydifferentinvestigatorsdonotmutualreactancesbutmutualresistanceseralarticleswhichgivedesignformulasal

7、waysagreewhenplacedinapposition,aswell.Astheapplicationengineer,conformanymachineimpedances,butthesebecausethedifferentinvestigatorsdonotfrontedbymorecomplexapplicationarticlesareallcharacterizedbythedesirenecessarilyselectthesameeffectiveturnproblems,hascreatedmore"completetopresent

8、theimpedance